Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation

@article{Fumagalli2021OscillationsIT,
  title={Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation},
  author={Jacopo Fumagalli and S'ebastien Renaux-Petel and Lukas T. Witkowski},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2021},
  volume={2021}
}
We identify a characteristic pattern in the scalar-induced stochastic gravitational wave background from particle production during inflation. If particle production is sufficiently efficient, the scalar power spectrum exhibits 𝒪(1) oscillations periodic in k, characteristic of a sharp feature, with an exponentially enhanced envelope. We systematically study the properties of the induced spectrum of gravitational waves sourced after inflation and find that this inherits the periodic structure… Expand
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References

SHOWING 1-10 OF 217 REFERENCES
JCAP 11
  • 017
  • 2019
JCAP 09
  • 037
  • 2020
Phys
  • Rev. Lett. 125, 121301
  • 2020
and L
  • T. Witkowski,
  • 2020
JCAP 05
  • 013
  • 2019
JHEP 01
  • 097
  • 2021
NANOGrav), Astrophys
  • J. Lett. 905,
  • 2020
Phys
  • Rev. D 76, 084019
  • 2007
Features of the inflaton potential and the power spectrum of cosmological perturbations
We discuss features of the inflaton potential that can lead to a strong enhancement of the power spectrum of curvature perturbations and the production of primordial black holes. We show that a steepExpand
JCAP 01
  • 059
  • 2021
...
1
2
3
4
5
...